ShoreTel IP Phone Factory Reset
If you have an issue that seems to be a phone bug, and have already gone through the process of resetting the phone, you can use these steps to return the phone to factory settings:
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Press MUTE then 772667# . The phone will ask if you would like to go into Factory Test Mode, press # for Yes.
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When prompted for the password, press 1234#
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The screen will be blank, now enter 25327# to clear the phone
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After clearing the data, the phone will reset back into the Factory Test Mode again.
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Power cycle the phone by unplugging it and plugging it back in. It will start up normally and re-pull all config files from the FTP server.